1QFB

THE CYCLIC PEPTIDE CONTRYPHAN-R FROM CONUS RADIATUS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST NOE & TOTAL ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Solution structure of contryphan-R, a naturally occurring disulfide-bridged octapeptide containing D-tryptophan: comparison with protein loops.

Pallaghy, P.K.Melnikova, A.P.Jimenez, E.C.Olivera, B.M.Norton, R.S.

(1999) Biochemistry 38: 11553-11559

  • DOI: 10.1021/bi990685j

  • PubMed Abstract: 
  • Contryphan-R is a disulfide-constrained octapeptide containing a D-tryptophan that was isolated recently from venom of the cone shell Conus radiatus. The polypeptide is present in two forms in solution due to cis-trans isomerization at hydroxyproline ...

    Contryphan-R is a disulfide-constrained octapeptide containing a D-tryptophan that was isolated recently from venom of the cone shell Conus radiatus. The polypeptide is present in two forms in solution due to cis-trans isomerization at hydroxyproline 3. The solution structure of the major form of this unusual polypeptide, determined from NMR data, consists of a well-defined fold containing a non-hydrogen-bonded chain reversal from Gly1 to Glu5, which includes a cis-hydroxyproline and a D-Trp, and a type I beta-turn from Glu5 to Cys8. The presence of a putative salt bridge between the Glu5 carboxyl group and the N-terminal ammonium group is investigated by using various solvation models during energy minimization and is compared with the results of a pH titration. A comparison of the structure of contryphan-R with other cyclic peptide structures highlights some of the key structural determinants of these peptides and suggests that the contryphan-R fold could be exploited as a scaffold onto which unrelated protein binding surfaces could be grafted. Comparison with small disulfide-bridged loops in larger proteins shows that contryphan-R is similar to a commonly occurring loop structure found in proteins.


    Related Citations: 
    • Contryphan is a D-Tryptophan-Containing Conus Peptide
      Jimenez, E.C.,Olivera, B.M.,Gray, W.R.,Cruz, L.J.
      (1996) J.Biol.Chem. 271: 28002


    Organizational Affiliation

    Biomolecular Research Institute, Parkville, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (CONTRYPHAN-R)
A
9Conus radiatusMutation(s): 0 
Find proteins for P58786 (Conus radiatus)
Go to UniProtKB:  P58786
Small Molecules
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

--

HYP
Query on HYP
A
L-PEPTIDE LINKINGC5 H9 N O3PRO
DTR
Query on DTR
A
D-PEPTIDE LINKINGC11 H12 N2 O2

--

Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST NOE & TOTAL ENERGY 
  • Olderado: 1QFB Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-09-29
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations